So I am pretty sure all of us have stumbled upon the ships maintenance log after shutting down the engine in SH;DW. Where we get a small profile of how the entire ship looks like. To me it looks like a Grand Cruiser from the Great Crusade era. However the fact there is a wreak of a Avenger Strike fighter in the ship kind of goes against this as that is a post-Heresy design with its first use being in the Age of Apostasy. Anyone got a clue?

Forge World finally released their Stormbird some time ago, and it wasn't all i wished it to be, so i took the design and made it sleeker and far larger to better match the aircraft i envisioned when reading the first Horus Heresy books.
It still looks like a flying brick, as per Imperial design standards, but no longer resembles a Thunderhawk with some extra wings strapped on - not so much anyway. Features include folding wings (inspired by descriptions in the early Heresy stories, and i figured that an aircraft with downwards-swept wings might want to have some sort of folding functionality to them for less spacious or flat landing zones) plus enough space for three Rhinos and even more Dreadnoughts, and a frontal assault ramp that unfolds once the triangular nose has split open sideways and down.